My car seems to like the VP Octanium. What ever you decide to use, read the specs carefully. Some will quote a certain number of "points" increase while others will quote "number" increase. There are 10 points per number; a point is 0.1 whereas a number is 1.0. For example, a booster claiming 10 point (one number) increase would take the octane from 93 to 94. An increase of 8 numbers (80 points) would take the same fuel from 93 to 101.